/*-
 * <<
 * UAVStack
 * ==
 * Copyright (C) 2016 - 2017 UAVStack
 * ==
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * >>
 */

package com.creditease.uav.apm.invokechain.spi;

import java.util.Map;

import com.creditease.uav.apm.invokechain.span.Span;

/**
 * 
 * SpanContext description: 调用链span上下文
 * 
 * 此类提供当前调用链的上下信息
 *
 */
public interface InvokeChainSpanContext {

    /**
     * 获取当前调用所有所有span
     * 
     * @return
     */
    public Map<String, Span> getSpansFromContext();

    /**
     * 获取当前服务内调用链的根节点
     * 
     * @return
     */
    public Span getMainSpan();
}
